256717696 has 48 divisors (see below), whose sum is σ = 528712920. Its totient is φ = 124158720.

The previous prime is 256717649. The next prime is 256717711. The reversal of 256717696 is 696717652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121965 + ... + 124051.

Almost surely, 2^256717696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256717696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264356460).

256717696 is an abundant number, since it is smaller than the sum of its proper divisors (271995224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256717696 is an equidigital number, since it uses as much as digits as its factorization.

256717696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163 (or 2120 counting only the distinct ones).

The product of its digits is 952560, while the sum is 49.

The square root of 256717696 is about 16022.4123027714. The cubic root of 256717696 is about 635.5532376578.

The spelling of 256717696 in words is "two hundred fifty-six million, seven hundred seventeen thousand, six hundred ninety-six".